Heating and Air Conditioning System (General Information)

H39194-UN-11OCT88

A - Holes

B - Air Duct

C - Pressurizer Fan

D - Pre-Cleaner

E - Air Filter

F - Recirculating Filter

G - Recirculator Blower

H - Duct

Air is drawn into the cab through holes (A). This air flows down air duct (B) and into the pressurizer fan (C). The air is then pushed through the pre-cleaner (D) where the majority of dirt and a small amount of air is discharged out through the cab floor. Be certain this opening is clear of debris.

This clean air is then passed through fresh air filter (E) into the evaporator compartment. The air is now mixed with air from inside the cab, being drawn into the evaporator compartment through the recirculating filter (F). It then passes through the evaporator and heater core.

Treated air (heated or cooled) is now drawn into the recirculator blower (G) and discharged into the cab through ducts (H).